Complain

I was not using my DSTV for the month of May as I was out of town and came back on the 30th of May and immediately I phoned Multichoice wanting them to reconnect me, I was given the amount to pay which was R1241 and I paid as I asked for Premium for the month of June, now on the 30 of June I check the balance to pay as I wanted to pay the amount is R1490 and I phoned the multichoice call Center and I spoke to another lady speaking who sounded Xhosa, I asked her to breakdown the bill for and it came out that it says I owe R299 which I don’t know is for what

I asked the lady to explain it to me and she put me on hold without telling me (I was on hold for 27 minutes) and eventually I got disconnected because my airtime ran out, and the mighty Multichoice hasn’t come back to me to explain to me what is the balance brought forward for and come to think of it every month I am made to pay balance brought forward even though I pay my subscription in full always but every month my bill includes balance brought forward